While Wozniak was the technical wizard at Apple, I don't think he had a real vision for Apple's products. Jobs had the vision of what Apple products had to be about:

- hardware internals: http://folklore.org/StoryView.py?project=Macintosh&story...

- hardware externals: http://folklore.org/StoryView.py?project=Macintosh&story...

- user interface: http://folklore.org/StoryView.py?project=Macintosh&story...

I believe if only Woz was Apple, it likely would have been an hardware manufacturer like so many back in those days. Steve made Apple unique.

In the context of the question being asked, I think a little indignation is entirely in order.

Has Woz ever shown any expertise in design? I mean really, it's like asking if Michelangelo knew his way around a fucking paint brush.

You are talking about hardware and/or engineering design. Important for sure but only one part of "design" and of a product having success in the marketplace. Without that appeal all the engineering genius in the world means nothing (and vice versa of course..)